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公开(公告)号：DE60126874T2
公开(公告)日：2007-10-31
申请号：DE60126874
申请日：2001-04-02
Applicant: SONY CORP
Inventor： ISHIGURO RYUJI , OSAWA YOSHITOMO , OISHI TATEO , ASANO TOMOYUKI , MITSUZAWA ATSUSHI
IPC: G06F12/14 , H04L9/00 , G06F1/00 , G06F21/10 , G06F21/62 , G11B20/00 , G11B20/10 , G11B20/12 , H04L9/08
Abstract: A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely.
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公开(公告)号：DE69636823T2
公开(公告)日：2007-10-18
申请号：DE69636823
申请日：1996-06-18
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , KAWASHIMA ISAO , KURIHARA AKIRA , OSAWA YOSHITOMO , OWA HIDEO
IPC: G06F12/00 , G06F12/14 , G06F1/00 , G11B20/00 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/32 , H04N5/85 , H04N5/913
Abstract: An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 18 and a synchronization appendage circuit 18, used for processing input data for forming a recording signal. Not only the key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.
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公开(公告)号：ES2277919T3
公开(公告)日：2007-08-01
申请号：ES01919777
申请日：2001-04-04
Applicant: SONY CORP
Inventor： ISHIGURO RYUJI , OSAWA YOSHITOMO , OISHI TATEO , ASANO TOMOYUKI , MITSUZAWA ATSUSHI
Abstract: Un sistema de procesamiento de información que tiene un grupo de dispositivos de procesamiento de información organizados en una estructura en árbol jerárquico que tiene una pluralidad de nodos y hojas, estando dichos nodos conectados a un nodo superior por vía de uno o más nodos intermedios, y correspondiendo cada hoja a un dispositivo de procesamiento de información, teniendo los nodos claves respectivas, teniendo cada dispositivo de procesamiento de información medios de procesamiento que almacenan un conjunto de claves que comprende una clave de hoja única para ese dispositivo, la clave de raíz del nodo superior y las claves de nodos de el, o cada, nodo intermedio que está en el trayecto directo desde la hoja correspondiente hasta el nodo superior, y capaces de funcionar para descifrar datos de mensaje cifrado distribuidos a dicho dispositivo, usando dicho conjunto de claves; estando dispuesto el sistema para enviar a un dispositivo de procesamiento de información un mensaje cifrado conuna clave nueva de nodo; comprendiendo el mensaje un bloque de claves habilitadoras (EKB), incluyendo el EKB: una parte de datos que contiene al menos la clave nueva de nodo cifrada con la clave de otro nodo del grupo, y una parte de etiquetas que contiene datos que indican la posición en el árbol jerárquico de la, o cada, dicha clave cifrada.
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公开(公告)号：DE60126874D1
公开(公告)日：2007-04-12
申请号：DE60126874
申请日：2001-04-02
Applicant: SONY CORP
Inventor： ISHIGURO RYUJI , OSAWA YOSHITOMO , OISHI TATEO , ASANO TOMOYUKI , MITSUZAWA ATSUSHI
IPC: G06F12/14 , H04L9/00 , G06F1/00 , G06F21/10 , G06F21/62 , G11B20/00 , G11B20/10 , G11B20/12 , H04L9/08
Abstract: A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely.
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公开(公告)号：AT356484T
公开(公告)日：2007-03-15
申请号：AT01272281
申请日：2001-12-21
Applicant: SONY CORP
Inventor： ASANO TOMOYUKI , OSAWA YOSHITOMO , OISHI TATEO , ISHIGURO RYUJI , TAKI RYUTA
IPC: G06F12/14 , G06F21/00 , G06F21/10 , G06F21/62 , G06Q30/06 , G06Q50/00 , G06Q50/10 , G11B20/00 , H04L9/08 , H04L29/06 , H04N7/167 , H04L9/00 , G11B20/10 , G10K15/02
Abstract: An information processing system and method are disclosed in which information processing is performed in a highly efficient manner using an enabling key block (EKB) on the basis of a tree structure including category subtrees. A key tree is produced so as to include a plurality of subtrees that are grouped in accordance with categories and managed by category entities. An EKB is produced so as to include data produced by selecting a path in the key tree and encrypting an upper-level key in the selected path using a lower-level key in the selected path, and the resultant EKB is provided to a device. If a change occurs in state of a category tree capable of processing an EKB identified in the EKB type definition list, a notification of the change in state is sent to an entity that uses the EKB thereby making it possible for an EKB requester to perform processing in accordance with a newest EKB.
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Patent Agency Ranking
公开(公告)号：AT354223T
公开(公告)日：2007-03-15
申请号：AT01919777
申请日：2001-04-04
Applicant: SONY CORP
Inventor： ISHIGURO RYUJI , OSAWA YOSHITOMO , OISHI TATEO , ASANO TOMOYUKI , MITSUZAWA ATSUSHI
Abstract: The enabling key block (EKB) used in an encrypted key distributing constitution of a tree structure is generated by reconstructing a simplified 2-branch or multi-branch type tree with a terminal node or leaf which can decrypt as the lowest stage, and on the basis of only the key corresponding to a node or a leaf of the reconstructed hierarchical tree. Further, a tag as discrimination data at a tree position of an encrypted key stored in EKB is stored. The tag not only discriminates a position but stores data for judging presence of encrypted key data.within EKB. A considerable reduction in data quantity is realized, and decrypting process, in a device is also simplified. Thus, an information processing system and method capable of reducing data quantity of an enabling key block (EKB) used in an encrypted key constitution of a tree structure is realized.
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公开(公告)号：DE69636823D1
公开(公告)日：2007-02-15
申请号：DE69636823
申请日：1996-06-18
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , KAWASHIMA ISAO , KURIHARA AKIRA , OSAWA YOSHITOMO , OWA HIDEO
IPC: G06F12/00 , G06F12/14 , G06F1/00 , G11B20/00 , G11B20/10 , G11B20/12 , G11B20/18 , G11B27/10 , G11B27/30 , G11B27/32 , H04N5/85 , H04N5/913
Abstract: An input is ciphered in at least one of a sector forming circuit 13, a scrambling circuit 14, a header appendage circuit 15, an error correction encoding circuit 16, a modulation circuit 18 and a synchronization appendage circuit 18, used for processing input data for forming a recording signal. Not only the key for ciphering itself in the circuits but also the information as to which of the circuits has been used for ciphering becomes the key for ciphering. This realizes ciphering difficult to decode by a simplified structure.
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公开(公告)号：AT355671T
公开(公告)日：2006-03-15
申请号：AT01917787
申请日：2001-04-02
Applicant: SONY CORP
Inventor： ISHIGURO RYUJI , OSAWA YOSHITOMO , OISHI TATEO , ASANO TOMOYUKI , MITSUZAWA ATSUSHI
IPC: G06F12/14 , G06F1/00 , G06F21/10 , G06F21/62 , G11B20/00 , H04L9/08 , H04L9/00 , G06Q20/00 , G11B20/10 , G11B20/12
Abstract: A content key, an authentication key, and a program data etc. are transmitted with an enabling key block (EKB) in an encrypted key constitution of a tree structure. The EKB has a constitution in which a device as a leaf of the tree holds a leaf key and a limited node key, and a specific enabling key block (EKB) is generated and distributed to a group specified by a specific node to limit devices that can be renewed. As the devices that do not belong to the group cannot perform decryption, the security for distributing keys etc. can be secured. Thus, distribution of various kinds of keys or data is executed in an encryption key constitution of a tree structure to realize an information processing system and method enabling to distribute data efficiently and safely.
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公开(公告)号：DE69635069D1
公开(公告)日：2005-09-22
申请号：DE69635069
申请日：1996-06-25
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , KURIHARA AKIRA , OSAWA YOSHITOMO , KAWASHIMA ISAO , OWA HIDEO
IPC: G06F1/00 , G06F21/10 , G06F21/62 , G06Q20/38 , G11B7/00 , G11B7/004 , G11B20/00 , G11B20/10 , H04L9/08
Abstract: A data recording apparatus is capable of easily preventing copying of information in that, even if information is copied, the copied information cannot be reproduced. The data recording apparatus has a terminal (2) to which encoder identification information ("ID") specific to the data recording apparatus is input, a recording unit (5) for recording at least the encoder ID on an optical disk (D), and an encoding circuit (3) for encoding, in accordance with the encoder ID, data supplied via a terminal (1) and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk (D).
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公开(公告)号：SG111925A1
公开(公告)日：2005-06-29
申请号：SG200108023
申请日：1999-10-14
Applicant: SONY CORP
Inventor： MATSUYAMA SHINAKO , ISHIBASHI YOSHIHITO , KITAHARA JUN , ASANO TOMOYUKI , KITAMURA IZURU , OSAWA YOSHITOMO , OISHI TATEO
Abstract: An accounting module 72 generates information indicating the use permission condition of information. A decoding/encryption module 74 generates authentication information of the information indicating the permission condition. A storage module 73 stores the authentication information.
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